To expand on this specifically, in addition to Sannie, Reddog from Sickmeds has told me personally he won't breed with fems believing it leads to hermies.
I've heard/read Subcool from TGA, Don from DNA Genetics, Scott from Rare Dankness, DJ Short, and Kyle Kushman all say either that they don't use fems (ever) or they won't breed with them. I think (but can't remember for sure) also hearing this from Simon of Serious ceeds.
So I'd say this pretty clearly is the consensus amongst the breeding community; breeding from feminized ceeds is frowned upon. But I am sort of generalizing here; each would probably tell you quite a bit more if you asked them to expand, and I don't want to put words into their mouths.
There are a few breeders who do put out a lot of S1 type plants; so yes, there are some who do this.
There are multiple issues here other than just using feminized beans at SOME point during the breeding process. The biggest one is hybridization and genetic assortment.
It doesn't matter if you hit an elite "clone only" with pollen from itself or even from a male sibling plant (assuming you had access to it, which you wouldn't). All these elite clone plants are hybrids, and if you cross any two hybrids you end up re-rolling the genetic dice and creating a wide variety of phenos. So in this unselected mix of phenos, you're going to get the full bell curve of genetic possibilities, including (if you're lucky) a few really good ones, but also a huge number of mediocre ones, and some really bad ones.
This is specifically why S1 (self pollinated) versions of famous clone only strains are only very rarely as good as the original. They'll usually have some of the good traits from the parent, but they'll also fall short with many others
As a second issue, repeatedly inbreeding the same strain is often problematic, causing loss of vigor and potentially other issues. Inbreeding can causes emergence of deleterious and otherwise rare recessive traits. Its basically the plant equivalent of having kids with your sister, and it doesn't matter if feminization is involved or not.